Comments on: Estimating Replication Capacity

By: Vojtech Kurka

Vojtech Kurka — Mon, 16 Jan 2012 14:10:00 +0000

I forgot to mention the version, it’s Percona Server 5.5.18-55-log

By: Vojtech Kurka

Vojtech Kurka — Mon, 16 Jan 2012 14:09:04 +0000

I’m trying to estimate the slave load using the UserStats method. But it doesn’t reflect the reality. Does it work well with row-level replication?

My testcase:
STOP SLAVE SQL_THREAD;
SELECT SLEEP(600);
START SLAVE;

Then i watch the counters while the slave is catching up, but I see only a slight progress, like 1 second of BUSY_TIME in 5 minutes while the slave is working. I see really high CPU utilization in htop for mysql, so it’s really working hard to apply the relay log events.

By: peter

peter — Thu, 22 Jul 2010 00:05:31 +0000

Hi,

The MySQL Built in replication is the most common way to do it. The Continuent Tungsten Replicator is the most known alternative product. There is Galera replication (synchronous) in development. DRBD is somethat replication, if you need it for high availability – replication happens on disk level and you can’t start MySQL on the “slave” until Master is down.

By: webvisionairs

webvisionairs — Wed, 21 Jul 2010 08:34:06 +0000

Hi Everyone,

Perhaps a bit off topic, but I want to know if there are any alternatives to mysql replication.
Since I’m on a shared host that does allow replication, I wondered if there are any other methods to get databases in sync ( besides from dumping and exporting data).

Looking forward for your answers